22100312221 has 8 divisors (see below), whose sum is σ = 23803161984. Its totient is φ = 20397866160.

The previous prime is 22100312191. The next prime is 22100312249. The reversal of 22100312221 is 12221300122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22100312221 - 2⁵ = 22100312189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22100312195 and 22100312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100312621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17976 + ... + 211006.

It is an arithmetic number, because the mean of its divisors is an integer number (2975395248).

Almost surely, 2^22100312221 is an apocalyptic number.

It is an amenable number.

22100312221 is a deficient number, since it is larger than the sum of its proper divisors (1702849763).

22100312221 is a wasteful number, since it uses less digits than its factorization.

22100312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201851.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22100312221 its reverse (12221300122), we get a palindrome (34321612343).

The spelling of 22100312221 in words is "twenty-two billion, one hundred million, three hundred twelve thousand, two hundred twenty-one".